Across‐Species Comparisons of Spatial Scales of Environmental Effects on Survival Rates of Northeast Pacific Salmon
Abstract We estimated the spatial scales of covariation in indices of spawner‐to‐recruit survival rates among 116 wild stocks of pink salmon Oncorhynchus gorbuscha , chum salmon O. keta , and sockeye salmon O. nerka . These data spanned roughly four decades and represented stocks from 15 geographica...
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crwiley:10.1577/t04-034.1 2023-12-03T10:28:35+01:00 Across‐Species Comparisons of Spatial Scales of Environmental Effects on Survival Rates of Northeast Pacific Salmon Pyper, Brian J. Mueter, Franz J. Peterman, Randall M. Natural Sciences and Engineering Research Council of Canada 2005 http://dx.doi.org/10.1577/t04-034.1 https://afspubs.onlinelibrary.wiley.com/doi/pdf/10.1577/T04-034.1 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Transactions of the American Fisheries Society volume 134, issue 1, page 86-104 ISSN 0002-8487 1548-8659 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 2005 crwiley https://doi.org/10.1577/t04-034.1 2023-11-09T13:15:44Z Abstract We estimated the spatial scales of covariation in indices of spawner‐to‐recruit survival rates among 116 wild stocks of pink salmon Oncorhynchus gorbuscha , chum salmon O. keta , and sockeye salmon O. nerka . These data spanned roughly four decades and represented stocks from 15 geographical regions in Washington, British Columbia, and Alaska. For comparisons between pink and chum salmon, we found positive covariation in survival rates within regions and between certain adjacent regions (e.g., correlations between 0.3 and 0.7) but little covariation between stocks of distant regions (separated by 1,000 km or more). Our results indicate that, on average, shared environmental effects accounted for at least 36% of the variation in survival rates of nearby pink and chum salmon stocks but only 18% for stocks separated by about 500 km. By comparing these between‐species patterns with within‐species patterns, we conclude that differences in the geographical overlap of fish during the freshwater and early marine life stages are much more important in determining the magnitude of shared environmental effects on the survival rates of these two species than are differences in their life history strategies. In contrast, patterns of covariation were weaker for between‐species comparisons involving sockeye salmon, especially for sockeye salmon stocks from Washington and British Columbia, which were mainly Fraser River stocks. By comparing between‐species correlations for northern sockeye salmon at two different time lags corresponding to processes operating during the early freshwater life stage and the early marine life stage, we found evidence that covariation in spawner‐to‐recruit survival rates was due largely to processes operating in the early marine life stage. Collectively, our results and those of previous studies show that the dominant effects of environmental processes on the survival rates of these three salmon species occur at local and regional scales rather than at larger, ocean‐basin scales. Article in Journal/Newspaper Oncorhynchus gorbuscha Pink salmon Alaska Wiley Online Library (via Crossref) Pacific Sockeye ENVELOPE(-130.143,-130.143,54.160,54.160) Keta ENVELOPE(-19.455,-19.455,65.656,65.656) Fraser River ENVELOPE(-62.243,-62.243,56.619,56.619) Transactions of the American Fisheries Society 134 1 86 104 |
institution |
Open Polar |
collection |
Wiley Online Library (via Crossref) |
op_collection_id |
crwiley |
language |
English |
topic |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Aquatic Science Ecology, Evolution, Behavior and Systematics Pyper, Brian J. Mueter, Franz J. Peterman, Randall M. Across‐Species Comparisons of Spatial Scales of Environmental Effects on Survival Rates of Northeast Pacific Salmon |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
Abstract We estimated the spatial scales of covariation in indices of spawner‐to‐recruit survival rates among 116 wild stocks of pink salmon Oncorhynchus gorbuscha , chum salmon O. keta , and sockeye salmon O. nerka . These data spanned roughly four decades and represented stocks from 15 geographical regions in Washington, British Columbia, and Alaska. For comparisons between pink and chum salmon, we found positive covariation in survival rates within regions and between certain adjacent regions (e.g., correlations between 0.3 and 0.7) but little covariation between stocks of distant regions (separated by 1,000 km or more). Our results indicate that, on average, shared environmental effects accounted for at least 36% of the variation in survival rates of nearby pink and chum salmon stocks but only 18% for stocks separated by about 500 km. By comparing these between‐species patterns with within‐species patterns, we conclude that differences in the geographical overlap of fish during the freshwater and early marine life stages are much more important in determining the magnitude of shared environmental effects on the survival rates of these two species than are differences in their life history strategies. In contrast, patterns of covariation were weaker for between‐species comparisons involving sockeye salmon, especially for sockeye salmon stocks from Washington and British Columbia, which were mainly Fraser River stocks. By comparing between‐species correlations for northern sockeye salmon at two different time lags corresponding to processes operating during the early freshwater life stage and the early marine life stage, we found evidence that covariation in spawner‐to‐recruit survival rates was due largely to processes operating in the early marine life stage. Collectively, our results and those of previous studies show that the dominant effects of environmental processes on the survival rates of these three salmon species occur at local and regional scales rather than at larger, ocean‐basin scales. |
author2 |
Natural Sciences and Engineering Research Council of Canada |
format |
Article in Journal/Newspaper |
author |
Pyper, Brian J. Mueter, Franz J. Peterman, Randall M. |
author_facet |
Pyper, Brian J. Mueter, Franz J. Peterman, Randall M. |
author_sort |
Pyper, Brian J. |
title |
Across‐Species Comparisons of Spatial Scales of Environmental Effects on Survival Rates of Northeast Pacific Salmon |
title_short |
Across‐Species Comparisons of Spatial Scales of Environmental Effects on Survival Rates of Northeast Pacific Salmon |
title_full |
Across‐Species Comparisons of Spatial Scales of Environmental Effects on Survival Rates of Northeast Pacific Salmon |
title_fullStr |
Across‐Species Comparisons of Spatial Scales of Environmental Effects on Survival Rates of Northeast Pacific Salmon |
title_full_unstemmed |
Across‐Species Comparisons of Spatial Scales of Environmental Effects on Survival Rates of Northeast Pacific Salmon |
title_sort |
across‐species comparisons of spatial scales of environmental effects on survival rates of northeast pacific salmon |
publisher |
Wiley |
publishDate |
2005 |
url |
http://dx.doi.org/10.1577/t04-034.1 https://afspubs.onlinelibrary.wiley.com/doi/pdf/10.1577/T04-034.1 |
long_lat |
ENVELOPE(-130.143,-130.143,54.160,54.160) ENVELOPE(-19.455,-19.455,65.656,65.656) ENVELOPE(-62.243,-62.243,56.619,56.619) |
geographic |
Pacific Sockeye Keta Fraser River |
geographic_facet |
Pacific Sockeye Keta Fraser River |
genre |
Oncorhynchus gorbuscha Pink salmon Alaska |
genre_facet |
Oncorhynchus gorbuscha Pink salmon Alaska |
op_source |
Transactions of the American Fisheries Society volume 134, issue 1, page 86-104 ISSN 0002-8487 1548-8659 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1577/t04-034.1 |
container_title |
Transactions of the American Fisheries Society |
container_volume |
134 |
container_issue |
1 |
container_start_page |
86 |
op_container_end_page |
104 |
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1784253347691233280 |